Ignition material for matches.



Mm-D rs-re PATENT" Fries.-

ROBERT ERNST ALWIN GANS, 'or- PANKOW, GERMANY,

IGNITION MATERIAL FOR MATCHES.

EPECIFICATION formingpart of Letters Patent No. 698,698, dated April 29, 1902. Application fileifleceinber 21-, 1898. small No. 699,932. (No specimens.)

To alhwhomit concern;

. Be'it known that-I, ROBERT: ERNST ALWIN GANS, chemist, a subject of the King of Prus sia, German Emperor, residing at Paukow, nearBerlin, in the Empire of Germany, have. invented certain new and useful lmprovements in Ignition Materials for Matches and other Purposes, (for which I have applied for a reagent which easily gives olf its oxygens, .such, for-instance, as saltpeter, barium peroxid, barium chromatm-potassium chlorate, or the like -is mixed 'with' onev or more salts of dithionic acid, (H S O trithionic acid,

z s sa) tetrathionic acid, (P1 8 pentathionic acid, (H S O or of acids produced by V the oxidation of saidacids or of, th'iosulfuric acid, (H 8 0 and then worked with a suitable binding substanceinto a' mass of a desired'conan ignition-point below sist'ence, The material thus obtained may be used as an ignitionmaterial either for Eriction-surfaces or for matches without any addition of 'white'oramorphousphosphorus.

Salts of. thiosulfu'ric acid have long been used in the manufacture of ignition materials,

I but Muspratt says in his Chemistry that no practical result has ever been obtained with these salts. The best results have not given 142 to 161 Celsius, according to Muspratt. The thiosulfates require an addition of a small quantity of amorphous phosphorus, which sooner or later-decomposes and is poisonous, An ignition material prepared irom'thiosulfates, and especially .fromthiosulfate of lead, produces, ac-.

damp-proof, and its cording to .Muspratt, an unpleasant smell whep bu rning, The most marked advantages of my ignition material areits. 10w ignitionpoint, which is between and centi grade, a special friction-surface being, therefore, not required. No addition of phosphorusis necessary, and the material does not, therefore, become poisonous. 'Theheat de- Veloped is amply sufficient to ignite parafiiu,

which is not the case with the thiosulfate material; There is no unpleasant smell in the burning of my material. It-is durable and that of the substances hitherto known. The

proportion of the substance giving ofi oxygen to said salts may vary'within Twide limits.

Thus, for instance, one part, by weight, of potassium chlorate and two parts of baryta salt of polythionic.acid givesquite as good an ignition material as three parts of potassium chlorate and one part of baryta salt. The ignition-point of the material is very low, so that it may be easily ignited on any friction-surface. By suitable additions the ignition powerof the new'material may be reduced to any desired'extent.

What I claim is l v 1. An ignition materialcompose'd of a salt of a polythionic acid and a substance which readily yields oxygen, substantially as described.

- 2. An ignition material composed ofa salt of tetrathionicacid and a substance which readily yields oxygen, substantially as described.

In'witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ROBERT me ALWIN GANS;

Witnesses:

WILLY ZIMM MANN, GUSTAV HiiLsMANN.

cost is no greaterthan. 

